[PATCH,gfortran] Fix for PR 17941

[Tobias Schlüter]

Paul Brook wrote:
> This is supposed to be an error. Your code is illegal in free-form source, and 
> already accepted in fixed-form.
> 
> Section 4.3.1.3 "Complex type" defines a complex literal constant as a pair of 
> signed real literal constants (plus "(,)" separators).
> Section 3.2 "Low-level syntax" says that a real literal constant is a single 
> lexical token.
> Section 3.3.1 "Free source form" says that whitespace may not occur within a 
> lexical token.

I believe that your analysis is not correct.  A signed-real-literal-constant
is not a real-literal-constant and it's not a literal token either.  Therefore
spaces are allowed.

- Tobi